Redwood Coast Offshore Wind

Offshore Wind Energy in Humboldt County

principle power offshore wind turbine

Redwood Coast Offshore Wind Project

Humboldt County has been featured in local, national, and international news since 2018 as a potentially ideal location for offshore wind energy generation. RCEA, tasked with developing local renewable resources and energy-related economic advancement, has taken lead in coordinating the extensive planning and research process required for what could be California’s first floating offshore wind project.

On May 25 the Biden-Harris Administration announced an agreement to advance areas for offshore wind off the northern (Humboldt County) and central coasts of California. This significant milestone is part of the Biden-Harris administration’s goal to create thousands of jobs through the deployment of 30 gigawatts (GW) of offshore wind by 2030.

Our expansive coastlines have some of the greatest offshore wind potential in the nation—wind turbines spinning off of our state’s coast could produce more than 150% of our state’s current demand for electricity with pollution-free power.

The Redwood Coast Offshore Wind Project could be a 100-150 MW project located approximately 25 miles west of Eureka. While conversations with local fishermen, tribes, environmentalists, labor unions, and government partners are ongoing, our community’s overall response to this prospective project has been supportive. RCEA is committed to advancing the responsible development of our offshore wind resource in a manner that maximizes benefits to the local community and impacted stakeholders.

Why Offshore Wind?

  • The North Coast has a world-class offshore wind resource
  • Offshore wind technology is now available to unlock its potential
  • Offshore wind diversifies the renewable portfolio needed to decarbonize California
  • Humboldt Bay is well suited to serve as a potential hub for a broader west-coast offshore wind industry

Redwood Coast Offshore Wind Project

  • 100-150 MW offshore
  • ~25 miles from Eureka in the Humboldt Call Area
  • 600-1,100 meters sea floor depth

Project Principles

  • Provide competitively priced renewable energy to electric ratepayers
  • Prioritize stakeholder engagement, acceptance, actively identify and address issues of local concern
  • Responsible development that minimizes environmental impacts
  • Maximize investment in local infrastructure to develop Humboldt Bay into an industry hub.
RCEA BOEM lease area map

Project Site

Selected based on extensive stakeholder input and technical factors:

  • Approximately 205 square miles. The lease size and configuration would be determined by the Bureau of Ocean Energy Management in 2021.
  • Existing uses: fishing and shipping
  • Wind resource
  • Wildlife and habitats
  • Technical constraints

Project Configuration

  • 5 to 15 turbines – (TBD based on final project and turbine sizing)
  • Anchored to the seabed using synthetic mooring lines
  • Inter-array cables connecting turbines to each other
  • Export to shore via subsea transmission cable (exact landfall location TBD)
  • Interconnection at Humboldt 115kV substation
  • The best port site to support the project would be the Redwood Marine Terminal 1 (RMT1). Upgrades would be required; the Humboldt Bay Harbor District is developing a conceptual plan.

For an overview of the design, watch this Principle Power, Inc. Windfloat video.

What is the Redwood Coast Offshore Wind consortium and the partnership?

At the beginning of April 2018 the RCEA Board of Directors selected partners for a public-private partnership to explore developing a wind farm off the coast of Humboldt County. The consortium, consisting of Principle Power Inc., EDPR Offshore North America LLC, Aker Solutions Inc., H. T. Harvey & Associates, and Herrera Environmental Consultants Inc, was selected from six highly qualified respondents after RCEA issued a Request for Qualifications in February.

RCEA and the consortium submitted an unsolicited lease application to the Bureau of Ocean Energy Management (BOEM) on September 12, 2018, for the tract of ocean shown in blue on the map above. In late 2018, BOEM solicited a call for information within an area, in black on the map above, that encompassed RCEA’s selected project area. Although RCEA’s unsolicited lease request was not granted, we are continuing with what will now be a competitive lease auction for the same area, as part of BOEM’s larger leasing process. The auction is expected to take place in mid-2022.

The consortium is working closely with local stakeholders to design a project that minimizes any potential impacts and maximizes local community benefits, should RCEA get awarded a lease. After that, the work of designing and developing a project will take years to complete and will be the product of extensive community collaboration.

The Project Partners

Photo of a sailoff of the WindFloat from an industrial dock.
Photo courtesy of Principle Power. Artist: DOCK90

Ocean Winds is the result of a 2019 joint venture by EDP Renewables (EDPR) and ENGIE. Both companies share the vision in which renewables, particularly offshore wind, play a key role in the global energy transition.

Aker Offshore Wind is a leader in the development of deepwater offshore wind power production.  They are a Norwegian offshore wind developer striving to create a sustainable future – one driven by clean, green energy. Check out Aker’s new video, they’ll take it from here.

RCEA works to develop and implement sustainable energy initiatives that reduce energy demand, increase energy efficiency, and advance the use of clean, efficient and renewable resources available in the region for the benefit of the Member agencies and their constituents.

For more on the partnerships and summary of the project, view the Times Standard article “RCEA announces partnership for offshore wind farm”.

Principle Power, is a global energy technology and services provider with headquarters in California. The Company’s proven, safe, reliable, and environmentally friendly WindFloat® floating technology is unlocking offshore wind potential worldwide.
Photo of a sailoff of one of Principle Power's turbines
Photo courtesy of Principle Power. Artist: DOCK90

The Process

Bureau of Ocean Energy Management –  California Activities
timeline of BOEM offshore wind leasing process including planning, leasing, site assessment, and construction and operations
diagram of turbines to shore
two floating wind turbines connected by morringlines which can be seen underwater
floating turbine barge

What is the Call for Information?

  • Notice published in the Federal Register for formal public comment
  • Requests nominations of interest from project developers for ocean leasing within three call areas, one off the Humboldt coast, and two off Morro Bay in central California.

Many of our community stakeholders submitted comments to:

  • Ensure that local offshore wind resources will be developed in a manner that aligns with our community’s preferences and also maximizes prioritizes local community benefits
  • Communicate the importance of direct community involvement and local stakeholder support as critical factors to offshore wind project viability ad success
  • Support Redwood Coast Offshore Wind project as right-sized project for local community and environment

Response to the Call for Information:

  • In response to the Call, the Bureau of Ocean Energy Management (BOEM) announced on April 23, 2019 that they received 14 nominations from developers who identified specific portions of the call areas for which they wish to obtain a commercial lease for a wind energy project.
  • Visit BOEM’s website for a summary of the nominations.

To learn more about the history of offshore wind, how it works, and the steps BOEM takes to work with many stakeholders when planning offshore wind development, watch BOEM’s “Renewable Energy Whiteboard” video

What About the Fishing Industry?

The North Coast region is home to a commercial fishing industry that provides sustainably-caught seafood to our community and many others.  For many generations these commercial fisheries have provided a livelihood for local fishermen and their families, and it continues to be a key element of our region’s economy and local culture.

The Redwood Offshore Wind consortium recognizes that a viable commercial fishing industry is integral to the economy and culture of the North Coast and that the development of offshore wind energy will permanently impact the commercial fishing industry economically and culturally. We recognize that such development should be pursued in a manner that minimizes and mitigates impacts to fishing so that both endeavors can sustainably coexist for the benefit of our community. Both the consortium and the Humboldt Fishermen’s Marketing Association  agree to cooperate and work together in good faith for the purpose of ensuring that the efforts of RCEA and its project partners to develop a floating offshore wind energy project off the coast of Humboldt County proceed in a way that effectively identifies, avoids, minimizes, and mitigates impacts to the commercial fishing industry to the greatest extent possible.

Memo of Understanding  with the Humboldt Fishermen’s Marketing Association and Redwood Coast Offshore Wind

Fishing Community Sustainability Plans – Fishing community sustainability planning for Eureka and Shelter Cove

Fishing Industry Facts:

  • Although the number of registered commercial fishing boats in the Humboldt Bay area has declined from approximately 500 in the 1950s to approximately 220 in 2004, the bay is still an important port for commercial fishing.
  • More than 500 vessels from other West Coast ports use the bay’s facilities annually. The commercial fishing fleet is based at Woodley Island Marina, the City of Eureka Marina, and to a lesser extent, the private King Salmon Marina (HBHRCD 2007)
  • Commercial crab fishing is highly active in nearshore waters off Eureka and makes up the overwhelming majority of Eureka commercial landings and ex-vessel revenue between 1992 and 2014 (Hackett et al. 2017).
  • Groundfish trawl fisheries occur at greater depths, generally in water depths less than 600 fathoms (1100 meters), with an average depth of <300 fathoms (550 meters) (Sommers et al. 2016).
  • Since 1981, total pounds of all fish landed in Eureka has dropped from a high in 1981 of 36.9 million pounds to on average 1.9 million pounds between 2001 and 2007; most of the decline was due to a decrease in groundfish landings (Pomeroy et al. 2010).

See page 33 of our lease application for Northern California Commercial and Recreational Fisheries, Gear Types, and Locations



The ecologists and professionals at H. T. Harvey & Associates deliver consulting services to public agencies, private entities, and nonprofit organizations. The mission of H. T. Harvey & Associates is to create ecologically sound solutions to complex natural resource challenges.

Additional Information and Resources

Does RCEA’s long-term contract for 100 MW of solar energy from the Sandrini Sol 1 project preclude RCEA contracting for offshore wind when that becomes available?

RCEA’s goal is to have a diversified power mix, and this long-term solar power purchase agreement is an ideal complement to offshore wind in a number of ways. The solar contract’s price per unit of energy is lower than we expect offshore wind to cost, but offshore wind’s time-of-day production better matches our customer energy demand throughout the day. In addition, the location of the solar project allows it to avoid the transmission access challenge that large-scale renewable energy generation sited in Humboldt County faces, due to our remoteness from the state’s main transmission corridors.

The Sandrini contract helps us meet our near-term SB350 compliance targets, which requires us to secure long-term renewable portfolio standard contracts, and it does so in a very cost-effective way. We could not have waited for offshore wind for this purpose, given the long development timeline. About half of RCEA’s portfolio remains open for long-term contracts.

News Articles

Interviews, Webinars, and Audio

  • California Coastal Commission: Informational Briefing and Public Comment on Offshore Wind. Informational briefing and public comment on Offshore Wind excerpted from a virtual meeting of the California Coastal Commission on September 9, 2021.
  • Webinar series: Exploring the Feasibility of Offshore Wind Energy for the CA North Coast. The Schatz Center hosted a series of five webinar workshops on the feasibility of offshore wind energy development on California’s north coast. In each webinar, they shared topical findings from their recently conducted studies. After each presentation, there was a moderated panel discussion. Webinar participants were then invited to share their insights, questions, and perspectives. September and October 2020.
  • Webinar: Potential Effects of Offshore Renewable Energy: Knowledge and Resources – Recorded April 15, 2020. Hosted by Pacific Ocean Energy Trust with a presentation by Pacific Northwest National Laboratory. April 2020
  • Interview: Astrid Skarheim Onsum, SVP, Head of Wind, Aker Solutions. Her view on the path ahead and the growing role and promising future of ‘floating wind.’ April 2019.
  • Explore North Coast and the Humboldt Bay Aquatic Center  – Explore North Coast and the Humboldt Bay Aquatic Center will present a talk in their lecture series Monday featuring Matthew Marshall, executive director of Redwood Coast Energy Authority. His presentation will focus on the potential of an offshore wind energy project. The lecture is scheduled from 6 to 8 p.m. at the Humboldt Bay Aquatic Center, 921, Waterfront Drive. Admission is free. September 10, 2018.
  • KHSU Thursday Night Talk – TNT explored the Redwood Coast Energy Authority’s proposal to put a floating offshore wind farm off Humboldt’s coast. The proposal, which would place floating wind turbines ~20-24 miles offcoast, would generate enough power to light all of Humboldt. Guests Lori Biodini of the Redwood Coast Energy Authority and Jen Kalt of Humboldt Baykeeper discussed the proposal and potential environmental impacts, both positive and negative, with host Tom Wheeler. July 2018.
  • Pacific Ocean Energy Trust (POET) – Marine Renewable Energy Environmental Regulatory Workshop Report: Moving to Better Information and Risk Retirement
  • Jefferson Public Exchange  – “North Coast Eyes Offshore Wind Farm,” interview with Lori Biondini of RCEA, Jason Busch of the Pacific Ocean Energy Trust, and Geoffrey Riley. April 24, 2018.
  • California Energy Commission – Webinar on Offshore Renewable Energy (audio recording). March 12, 2018.
  • KHSU EcoNews Report – Interview with Matthew Marshall and Jen Kalt. February 22, 2018.
  • Sustainable Futures Speaker Series – “Do Wind Turbines Make Good Neighbors?” Founder’s Hall 118, at Humboldt State University. Presentation by Joseph Rand, Research Affiliate, Electricity Markets & Policy Group at Lawrence Berkeley National Lab. Video archive will be available soon from the HSU Library. February 22, 2018.


Senator McGuire hosted a Joint Committee on Fisheries and Aquaculture an offshore wind energy hearing on May 3, 2019 at the Humboldt Bay Aquatic Center in Eureka.

  • California’s Fisheries and Wildlife – Can they co-exist with Offshore Wind Energy Development?
  •  Access Humboldt Channel 11

Technical Reports

Online Resources

  • United States Annual Average Wind Speeds. From the National Renewable Energy Lab
  • Federal Bureau of Ocean Energy Management. Responsible for issuing leases for offshore wind energy projects in federal waters, the mission of the Bureau of Ocean Energy Management (BOEM) is to manage development of U.S. Outer Continental Shelf energy and mineral resources in an environmentally and economically responsible way.
  • California Offshore Wind Energy Gateway. A joint project of BOEM, the CA Public Utilities Commission, and the CA Energy Commission, the Offshore Renewable Wind Energy Gateway assembles geospatial information on ocean wind resources, ecological and natural resources, ocean commercial and recreational uses and community values. This information will help identify areas off California that are potentially suitable for wind energy generation.
  • The Schatz Center’s new offshore wind energy webpage highlights their studies’ efforts related to potential offshore wind energy development on the northern California coast. Studies include research funded by the Ocean Protection Council, BOEM, the California Governor’s Office of Planning and Research and the California Energy Commission’s (CEC) Electric Program Investment Charge (EPIC).
Person holding an umbrella being blown backwards next to a windy ocean

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